Tray unit for an ultrasonic cleaning machine



FIG. 1 is a front perspective view of a tray unit for an ultrasonic cleaning machine showing my new design;

FIG. 2 is a top plan view thereof;

FIG. 3 is a front elevational view thereof; the rear view being the same;

FIG. 4 is a right side elevational view thereof, the left side being the same;

FIG. 5 is a bottom plan view thereof; and

FIG. 6 is a perspective view of an alternate embodiment thereof. 

The ornamental design for a tray unit for an ultrasonic cleaning machine, as shown and described. 